SCHEDULE 13G/A 0001546172 XXXXXXXX LIVE 1 Common Stock, $0.01 par value 12/31/2025 0000925528 HUDSON TECHNOLOGIES INC /NY 444144109 PO BOX 1541 ONE BLUE HILL PLAZA, 14TH FLOOR PEARL RIVER NY 10965 Rule 13d-1(c) WESTERLY CAPITAL MANAGEMENT, LLC DE 0.00 2550000.00 0.00 2550000.00 5.9 IA HUDSON TECHNOLOGIES INC /NY PO BOX 1541, ONE BLUE HILL PLAZA, 14TH FLOOR, PEARL RIVER, NEW YORK, 10965. Westerly Capital Management, LLC Westerly Capital Management, LLC 201 Mission Street, Suite 580 San Francisco, CA 94105 For citizenship of the Filer, see Item 4 of the cover sheet. N Information with respect to the Reporting Person's ownership of the Common Stock as of December 31, 2025, is incorporated by reference to items (5) - (9) and (11) of the cover page of the respective Reporting Person. The amount beneficially owned by each Reporting Person is determined based on 43,598,202 shares of Common Stock outstanding as of October 20, 2025, as reported in the Form 10-Q for the quarterly period ended September 30, 2025, filed with the SEC on November 7, 2025. Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. WESTERLY CAPITAL MANAGEMENT, LLC /s/ Christopher J. Galvin 02/17/2026